Scale



Feb". 11, 1936. 'H, L, WALKER 2,030,666

SCALE Filed May 11, 1932 l3 INVENTOR.

HAROLD L. u/ALkER,

BY Dull, QM am ATTORNEYS.

Patented Feb. 11, 1936 UNITED STATES PATENT OFFICE- SCALE Harold L.Walker, Brooklyn, N. Y., assignor to The Jacobs Bros. Co. 1110.,Brooklyn, N. Y., a corporation of New York Application May 11, 1932,Serial No. 610,559

4 Claims. (Cl. 265-69) This invention relates to a structurally andvention might be embodied (as will hereinafter functionally improvedscale and aims to proappear) in scales of various other types. vide anarticle of this character which may read- Referring primarily to therack bar l4, it is ily be manufactured and set up to furnish an wellappreciated by those skilled in the art that apparatus functioning overlong periods of time considerable diii'iculty has been heretofore exwithfreedom from mechanical difliculty. perienced, due to binding tendencybetween the A further object of the invention is that of teeth of thebar and the pinion. This has been providing a scale in which weightindications caused usually, by the fact that the lower end will beaccurately registered, despite variations of the rack bar has beencapable of movements in temperature. other than purely reciprocating. Itwill be ap- 10 A further object is that of providing a scale in parentthat, if in addition to thrusting or pulling which there will be littleif any danger of the the rack bar upwards and downwards, its lower partsbinding or becoming disarranged in such end is swung, then a bindingtendency is liable manner as would ordinarily require their being to beset up between the teeth of the parts aforereadjusted or reassembled.mentioned. Now, in order to overcome this dif- 15 With these and otherobjects in mind, referficulty, it will be observed, as in Figs. 2 and 3,ence is had to the attached sheet of drawing that the end of the beamterminates in a curved illustrating one practical embodiment of theinsurface l8 which is an arc of a circle having as vention, and inwhich: its center the pivot IQ of the beam. It will thus Fig. 1 is aface view of a scale; be apparent that regardless of the position of 20Fig. 2 is a sectional side view thereof; the beam, that portion of thesurface l8 which Fig. 3 is a fragmentary partly sectional view extendsin a horizontal plane drawn from the of the beam and associated parts;beam pivots will be extending in a plane truly Fig. 4 is an enlargedview of the temperatureat right angles to such first named plane. Now,

compensating structure and if the end of the rack bar is maintained incon- 25 Fig. 5 is a face view of the parts as shown in tact with thesurface I, it will be apparent that F 8. 4. such rack bar will be guidedso that its move- In these several views, the numeral 5 indiments willbe purely reciprocatory, thus overcates a scale base upon which aplatform 6 is coming the difliculties heretofore enumerated.

supported to receive articles to be weighed. With a view to assuringsuch contact, a stirrup 30 This platform is connected to a registering20 may have its upper end pivotally supported mechanism which, in thepresent embodiment at the upper end of the surface l8, its lower end ofthe invention, embraces a rockingly mountextending outwardly andbridging, for example, ed pointer 1 which traverses the face of as at2|, the end of the bar M, which is pivoted a. dial 8, the latter beingslitted or interthereto. In this manner, the teeth of the rack 35 ruptedas, for example, at 9, so that the weight will always remain parallelwith the teeth pinion. value registered may be observed from both sidesNow, referring to the thermostatic structure, 01 the S6818. eitherthrough the pe 0 which forms part of the present invention, it will Hwhich are formed in the housing ehcasihg be observed that a pair ofbi-metallicthermostatic 1 the registering 'h The platform 5 is strips 22and 23 are secured to the beam in line 4 mounted upon rockmgly Supportedbeam with the pivot l9. Secured to the outer ends of and the latter isconnected in a manner hereinthese strips are Weights 24 and in mountingthe after described to a rack M the teeth of which strips, care shouuldbe taken that the metal which mesh mm pmlon to the Shaft of whlch thehas the greatest co-efiicient of expansion be nor- 33: $33 f w f' fi fgf f ii gj g g mally disposed towards that side of the beam with weight'6 and that a spfing may be provided which the spring is associated.Consequently, in for the purpose f resisting downward thrusts coldweather the weights 24 will incline towards upon the platfom 5 the left,as viewed in Figs. 2 and 3, and will com- In the illustrated embodiment,no attempt has Densate for t 58 of Weight Which Would 50 been made toshow the detailed adjustments narily be indicated by the registeringmechanism which may be provided in connection with the due to thetemperature effect on the springs. spring and other mechanism of thescale. Also, Conversely, in the case of increasing temperawhile in thedrawing a fan type" scale has ture (i. e., higher than normal), theweights will been illustrated, it will be apparent that this ininclineto the right, as viewed in the figures in question, thus againcorrecting any errors which would otherwise come into being.

Thus, among others, the several objects of the invention, as aforebrought out, are achieved. It will, moreover, be appreciated thatnumerous changes in construction and rearrangements of the parts mightbe resorted to without departing from the spirit of the invention asdefined by the claims.

Having described my invention, what I claim as new and desire to secureby Letters Patent, is:

1. A scale including a rockingly mounted beam, a thermostatic stripextending vertically in line with the beam pivots and secured to saidbeam and a weight secured to the upper end of said strip.

2. A scale including a rockingly mounted beam, 1:. thermostatic stripextending vertically in line with the beam pivots and secured to saidbeam and a weight secured to the lower end of said strip.

3. A scale including a rockingly mounted beam. a thermostatic stripextending vertically in line with the beam pivots and secured to saidbeam and weights secured to the upper and lower ends of said strip anddisposed above and below the point of pivotal mounting of said beam.

4. A scale including a rockingly mounted beam, a thermal responsivemember connected to said beam at right angles to the axis thereof, and aweight carried by said thermal responsive member and adapted to movetoward or away from said beam and to either side of the point mountingthereof and in response to temperature changes.

HAROLD L. WALKER.

